Bending-machine.



C. M. YODER'.

BENDING MACHINE.

APPLICATION FILED DEC. 11., 1910. RENEWED OCT. 30. 1916.

Patented Apr. 30. 1918.

CARL M. YODER, or onnvnnenn, oi-r10.

-rrabn.i

BENDING-MAGHINE.

menses.

Specificationof Letters latent. Eatentttdl Apr. 3 3 191%..

Application filed December 17, 1910, serial to. 597,7ee. Renewe October so, 1916. Serial No. 128,632. g a

To all whom it may concern:

Be it known that I, CARL citizen of the United States, and resident of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Bending-Machines, of which I hereby declare the following to be a full, clear, and exact description,

such as will enable others skilled in the art to which it appertains to make and use the same.

.This invention relates to apparatus for bending rods, bars, sheet metal strips or hands and other articles into any desired shape. The invention is especially adaptable for bending a metal plate, strip or band edgewise or in its own plane without in any wise crimping, twisting or deforming the metal. j s i Y One object of the. invention isto provide improved means i for bending sections of metal. 7 Y .7

Another objectof the invention-is to provide improved means for fastening and moving either or both ends of the section of metal to be bent. Another object of the invention is to provide improved means for bending a section ofmetal and preventing twisting, springing, bulging. or crimping thereof while being bent. i l With these and other objectsin view, the

' invention consists of the parts or combinations of parts hereinafter described and set forth in the appended claims.

' As an illustrative applicationfof my in ventionT have herein disclosed it as adapted for the edgewise "bending of a sheet v metal strip or band, whereby the. strip or band maybe used asthe mud rim of an automobile wheel guard orfender. For the purpose of illustration I have, in the accompanying drawings, shown and herein described one form of apparatus embodyingmy invention. j j V Figure 1 's a plan view ofa metal bending apparatus. embodying my, invention. f

Fig.2 is aside elevation of the apparatus. Fig. 3 is an enlarged transverse "section of the supporting and holdin means for the metaljband, and one ofthe 0 amps therefor showing its broadened base resting upon the flat surface of the table Fig. lis an ene d r lv w n e rete rr ne M. Yemen, a

jaws andaFigs. 5 and 6 are enlarged end and side views of the same.

In these views 1 is a fiat topped table upon which are arranged one or more formers 2, 2-. One edge of each former is shaped to. give the desired bend, shape or contour to the metal. I preferably provide two formers and correlate them so that the metal strip or band can be bent in opposite directions simultaneously.

' 8 indicates a series of supports for each former 2. The supports 3 maybe arranged along the rear or outer edge of the adjacent above the table, shown in Fig. 2, for a purpose to be: later set forth. The table is formed with series of'spaced openings he,

'The table 1 is preferably rel'llovably. s6.-

cured upon a frame 5orother suitable supportand canrbe madein one or more sections as desired. l i e I 6 indicates atrackway arranged at either end of the table 1, and extending transve'rsely thereof. Each traclrway 6 .islprefer- 1 ably mounted on the support 5 and j-adapted to movably support a carrier 7 "to. which one end of thesection 'ofmetal toibe bent .is secured... Each carrier 7 may be provided with rollers 8,]iwhichrun upon a track of the adjacent trackway, and a handle 9,

whereby it maybe operated. 10 indicatefs a block slidablymo-unted.on each carrier 7 Each block is, formed with anopeninglO to receive wedge shaped gripping jaws .11,

between which the adj acentend of the metal band 12 is rigidly secured .Thefjaws 11 can be clamped and released bya hand lever 13 to which they maybe connected by arms 14. Each lever 13 is. preferably pivoted upon a brackctcarried by theadjacent block 10. The sliding blocks" 10 are mounted in guides 15 and the block 10 at one end of the machineis adjustable therein, hymeans of former and preferably support it slightly a yoke 16, attached to. a screw rod 17 which engages a wheel nut 18 operating between standards 19 on thecarrier The blockvlO at theopposite endof the machine is preferably attached; toma st red-11 d. w i eaver w e:

between their longitudinal edges.

sion springs 21, 21 which in turn press against posts 22, 22 rigidly mounted upon the carriage. When tension 18 putupon the mud rim, or section of metal to be bent, 1t will be absorbed by the springs 21 and thus prevent breaking'the mud rim.

The mud rim or band 12 may be provided with marginal wires 23,23, as shown in Fig.

band 12 being held between them.

2' The two sets of retaining members are secured against the opposite faces of the band by means of clamping devices preferably ar ranged 011 the table at regular intervals. The clamping devices are each formed in two parts viZ., a standard 29 which is preferably provided with a broad base 30 extending on both sides of the'retaining members and a cam 31 pivoted in the overhanging member 32 at theupper end of the standard 29. The cam is provided with an operating handle and engages .a plate 34 which rests upon the upper series of retaining members. A notch 35 in the edge of the cam serves as a stop to prevent thecam from slipping when properly set.

By supporting the formers above the table "1, the bases of the standards may slide thereunder durin zthe bending operations. Each base. is suficiently broad to prevent the clamps andband 12 from tilting in any direction under the bending strain, and slides freely upon the smooth surface of the table, but guides in the table therefor can be provided if necessary. The edge of the former or formers is preferably grooved at 36 to admit the wired edge of the band 12' and also assist in keeping the band in one plane while being stretched and bent.

This groove may be of any required shape ordepthto correspond to the shape of the projecting edge, andmay be formed in any desired manner, In operation, the carriers can be operatedseparately or simultaneously in conjunction with two curved formers, or only one curved former is used one carrier can be held immovable while the other is operated to bend the band. Where only one curve is required in the band one carrier at one end of the band 12 is preferably used so that the work can be done more quickly in oneop'eration; f I 1 When only-one carrier is used the other end of the band or the other carrier can be secured in place by means of a hooked pin 37 in the bed plate or any other suitable means, so that it will not rise when put under tension.

To those skilled in the art of making apparatus of the class described, many alterations in construction and widely dill'cring embodiments and applications of my invention will suggest themselves, without departing from the piritand scope thereof. My disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

Having described the invention what I. claim as new and desire to secure by Letters Patent is:

1. In a machine for bending a metal strip, the combination of a support having a curved edge, a curved form on said support having a portion thereof directed toward such edge,

strip-anchoring means at one end of said form, and an operating arm adapted to engage the end of a strip which is connected to the anchoring means, said operating arm having a. portion adapted to engage the curved edge.

2. In a machine for bending a strip of metal in the direction of its edge, a table, a former thereon provided with a guiding edge adapted to receive the edge of said strip, a securing means for one end of the strip, and a movable securing means for the other end of said strip, one of said securing means being resiliently. mounted and a track upon which said mo able moves.

3. In a machine for bending a band of metal in the direction of its edge, a table, a former mounted thereon and provided with a forming edge, and with a guiding groove therein, a carriage at one end of the machine, a track therefor, jaws, one of which is movable, mounted in said carriage, and adapted to grip one end of the band, means for gripping the other end of the band, and means for operating said carriage.

st. In a bending machine for a strip of metal, in combination, a table provided with openings, 21 former thereon having a forming edge, supports for said former adapted to separate the forming edge from said table, means insertible in said openings in said table for securing said former thereto, a track at one end of said table, a carrier adapted to traverse said track, a securing means for one end of said strip of metal in said carrier, and a securing means for the other end of said strip of metal at the opposite end of the machine.

5. In a machine for bending a strip of metal in the direction of its edge, a table, a former thereon, a securing means for one endiof the strip, movable securing means for the other end of said strip, one of said SCClll'] 11g lllQilllS {1 securing lmeans :Jbe'ingresiliently mounted, :and] atrack upon WlllCh said i movablesecur- 6: In, abendingrmachmeyfor a strip-ofmetal, a table, a1former thereon, a carrlage,

,1 t k therefor at one end ofthe m h a 1 securing means for one end of the :strip in said carriage, securing means for the other "end of said strip at the other end of the r and mounted on said table; i

7 Ina bending machine, a table, a rality of formers thereonya track at each machine, and removable. supports for said track,*a pair of gripplng' jaws .in each carriage, and anlad ustable supportiorone )air of 'ri nin 'awsin one carriage. ,7

8. In a bending machine, a table, a plurality of formers thereon, a track at each end of the table, a carriagemovable on each track, a pair of gripping jawsayieldingly mounted in one of said. carriages, and a pair oi jaws adjustably mounted in the other car- ['MWG. i

' mer over which a section of metal may be bent, means for holding and supportingthe section of metal, said means including devices which are clamped against the opposite sides of the metal section and prevent distortion thereof, and elements, one of which is movable to bend the section over said former, connected to the opposite ends of the metal section and operating to maintain it under tension while the section of metal is being bent.

10. The combination of a support, a former over which a section of metal may be bent, devices secured to the opposite ends of the section of metal and acting in opposite directions to support the metal section in operative relation to the former, one of said devices being movable on said support, and means engaging the opposite sides of the metal section between said securing devices to prevent distortion or twisting thereof.

11. In a metal bending machine, the combination of a former over which asection of metal isbent, movable devices secured to the opposite ends of the metal section for supporting one longitudinal edge of the metal section in operative relation to the. former and co-acting when moved to bend the metal in its own plane thereover, and means extending longitudinally from end to endof the metal section and engaging the opposite faces thereof to prevent its distortion.

12. The combination of-a support, a for mer over which a section of metal maybe bent, devices secured to the opposite ends of the section of metal to support one longitudinal edge of the metal section in operative relation to the former, one of said devices being movable in the plane of the metal distortion "thereof.

section, and means clamped against the; opfposite faces of "the metal section and co acting't'o prevent distortion or twisting thereof. 13. In a metal bending machine, the combination ofa support, a former over which a section of metal is adapted to be bent, means 'movably mounted on said support and sesured to the opposite ends of the metal section for supporting itin operative relation to theformer and bending the metal section thereover, said movable means operating to maintain the metalsection taut as itis :bent over said former, and means engagmg the opposite faces of the metal sectlon to prevent laz The combination of a support, a former overwhich a sectionof metal maybe 'bent,'devices secured to the opposite ends of "the section ofmetal and acting in opposite di'r'ections to support the metal section in operative relation to the former, one of said devices being movable, and flexible means clamped against the oppositesides of the metal section and movable therewith to prea i v vent distortion or twisting thereof. 9. The combination of a support, a for V 15'. The combination of a support, a former over which a section of metal may be bent, devices secured to the opposite ends of the section of metal and acting in opposite directions to support the metal section in operative relation to the former, one of said devices being movable, flexible means clamped against the opposite sides of the metal section and movable therewith to prevent distortion or twisting thereof, and a guide for said movable device. 7

16; The combination of a support, a former over which a section of metal may be bent, devices secured to the opposite ends of the section of metal to support the metal section in operative relation to the former, one of said securing devices being yieldingly mounted and one of said securing devices being movable, and means engaging the opposite sides of the metal section to prevent distortion or twisting thereof.

17. Thecombination of a support, a former over which a section of metal may be bent, devices secured to the opposite ends of the section of metal to support one longitudinal. edge of the metal section in operative relation to the former, one of said devices being adjustable and one of said devices be ing movable in the plane of the metal section, and means engaging the opposite faces of the metal section to prevent distortion or twisting thereof.

18., The combination of a support, a former over which a section of metal may be bent, devices, one of which is movable, secured to the opposite ends of the section of metal to support the metal section in operative relation to the former, one of said devices being yieldingly mounted and the other device being adjustably mounted, and means engaging the opposite sides of the metal sectionto prevent distortion or twisting thereof. 19. In apparatus for bending a section of -meta],"the combination of a support, a fortion asit is bent and operating against the opposite sides thereof to prevent its twisting vor distortion. .7

20. The combination of a support, a former overavhich a section of metal may be bent, devices secured to the opposite ends of the metal section for holding it in operative re lation to the former, and means slidably mounted on the support and engaging the metal section between said devices.

21. The combination of a support, a former over whicha section of metal may be bent, devices secured to the opposite ends of the metal section for holding it in operative relation to the former, means slidably mounted on the support and engaging the metal section between said devices, and means for supporting the former above the support to permit the slidably mounted means to move therebeneath.

22. The combination of a support, a former over which a section of metal may be bent, a device for holding one end of the metal section, a movable device for holding the opposite end of the metal section, and means engaging the metal section between said devices for preventing distortion of the metal section, said means having sliding engagement with said sup )ort.

In testimony \vhereo I hereunto set my hand this 15th day of December, 1910.

CARL M. YODER. In presence of Gno. S. Conn, 31. 11. MONROE.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patonta, v Washington, D. G. 

